Switch actuating mechanism



SPt 9, 1952 w. J. KELLEIGH I 2,610,274

SWITCH ACTUATING MECHANISM Filed June 29, 1949 3 Sheets-Sheet l JJ j 7+ ,3g 3,3 J6 6' l 3 Sheets-Sheet 2 [wvemar a/daJfel/e Az a W. J. KELLEIGH SWITCH ACTUATING MECHANISM Sept. 9, 1952 Filed June 29, 1949 Sept 9, 1952 w. J. KELLEIGH 2,610,274

SWITCH ACTUATING MEI-CHANISMI VW y A @ya Patented Sept. 9, 1952 SWITCH ACTUATING MECHANISM Waldo J. Kelleigh, Wayland, Mass., assignor to General Control Company, Boston, Mass., a corporation ofMassachusetts Application June 29, 1949, Serial No. 102,089

16 Claims. (Cl. 20e-4.53)

This invention relates to actuating mechanisms and more particularly to mechanisms which during successive operations thereof alternately actuate and release a switch or other device.

Objects of this invention are to provide a mechanism which during a first operation thereof actuates a switch or other associated device, which maintains such device in an actuated status until operated a second time, which releases such device upon a second operation thereof which is rapid and positive in operation, which does not jam, which is rugged and trouble free, which requires a minimum of moving parts, which has a long operating life, which is simple to manufacture, and which advances the mechanical art generally.

In a broad aspect the invention contemplates a mechanism comprising two movable members which are positioned relatively to each other with .their respective paths of travel intersecting. One or both of the members are arranged to operate an associated device near the end or other portion of their path of travel. Such device may be switch contacts, a switch of the quick acting snap action type, lor other mechanically operated apparatus for example a latch, detent or valve. Biasing, which may be either the force supplied by a spring or by gravity, is employed to urge the members towards one limit of their respective paths of travel. The mechanism is operated by an actuator which during successive strokes thereof alternatively moves the members from the biased limit to an opposite limit or" their respective paths of travel. The members` are arranged so that the iirst member moved to such opposite limit by the iirst stroke of the actuator is maintained at such limit by the second member. The succeeding stroke of the actuator moves the second member to the opposite limit of its path thereby releasing the first member so that it returns to the biased limit of its path wherein it maintains such second member at the opposite end of its travel.

In one aspect the movable members maybe slidably mounted `with their paths symmetrically arranged with respect to the path of travel of a reciprocating actuator. The actuator is provided with a pivoted cam portion `for alternatively contacting cammed portions of `the respective movable members. The members are also provided with detent portions whereby the rst member moved to the limit opposite the biased limit by the first stroke of the actuator is maintained at such limit until released by the second member as itis subsequently moved towards its opposite limit by the second stroke of the actuator.

In another aspect the members are rotatable, being pivotally arranged relatively to each other so that their arcuate paths of travel intersect, these paths preferably being arranged symmetrically with respect to the path of a reciprocating actuator. The actuator has a pivotally arranged portion for alternatively contacting the cammed portions of the respective members so that the rst. member contacted is rotated to the limit opposite the biased limit of its path of travel. The iirst member is maintained at such limit by a detent portion provided upon the second member. The succeeding stroke of the actuator rotates the second member to the opposite limit of itspath thereby releasing the first member so that it returns to the biased limit of its path wherein a detent portion thereupon maintains the second member at the oppolte limit of its travel.

A feature of the invention is a body or frame cast or otherwise formed with two spaced bosses whereupon are pivotally secured the rotatable members. The bosses are joined by a connecting portion or bridge having an aperture wherein is reciprocatingly disposed an actuator, the axis of such aperture being normal to a plane through the aXes of the respective bosses. The switch or other device operated by the mechanism is attached to the opposite side of the body from the rotatable members. The torque for :actuating the device isA transmitted from one of the rotatable members through a shaft projecting through a centrically located aperture in the` correlated boss, which shaft also acts as a pivot for such member.

A feature of another embodiment of the invention is a channel shaped frame having a web whereupon are mounted the rotatable members, the actuator and one or more stationary electrical contacts. One or both of the members may carry a respective moving electrical Contact for making contact with the corresponding stationary contacts when the respective rotatable members are at one limit of their paths of travel.

These and other objects, aspects and features will be apparent from the following description of several illustrative specic embodiments of the invention referring to drawings in which:

Fig. 1 is a front elevation view of one embodiment with the actuator positioned at the start of a stroke;

Fig. 2 is a View similar to Fig. 1 with the actuator at the end of the stroke for which it is positioned in Fig. l;

Fig. 3 is a view similar to Fig. 1 with the actuator at the start of the second stroke;

Fig. i is a plan view of the same embodiment;

Fig. 5 is a side elevation of the embodiment shown in Fig. 4;

Fig. 6 is a rear elevation of the embodiment shown in Fig. 4;

Fig. 8 is a modication of the embodiment shown in Figs. 1 to 7 wherein movable switch contacts are carried by the rotatable arms;

Fig. 9 is a section on line S-il of Fig. 8;

Fig. 10 is an isometric view of one of the movable contact arms;

Fig. l1 is a modication of the embodiments shown in Figs. 1 to 10 wherein the arms operate an associated mechanical device;`

Fig. 12 is a front elevation view of a further embodiment wherein the electrical contacts are carried upon the movable arms and which is of particularly simple construction permitting the shaping oi most parts from sheet material;

Fig.. 13 is a section online |3|3 of Fig. 12;

Fig. 141l is a frontV elevation view of another embodiment with the actuator positioned. at the start of a stroke;

Fig. 15. is a. view. similar: to Fig. le with the actuator atV the end o the stroke forl which it is positioned. in Fig. 14;.

Fig; 1.6 is a View similar to.Fig..14 with the actuator at the startof a second stroke;V andV Fig. 17 is aside elevation ofthe embodiment shown in Figs, 14.170 16;.

The embodiment of the invention shown. in Figs. 1 through 7 is a mechanism for operating a switch S. The mechanism. comprises Ia frame or body 2i) preferably cast from a metal such as aluminum and havingtwo bosses 2| (Fig. 4) joined by a connectingV portion or bridge 22; rIihe body 20 is further strengthened by two anges 23 extending normally from the bridge 22 at the outer portion ci the respective bosses 2|.

As is best. shown in Fig. 5, each boss 22?` has an axially disposed aperture.therethroughwhereinis journaleda shaft' 24. The ends of the shafts 24' have threaded recesses in-eachoi which there is secured a respective cap screw by means of a lock-washer 21 having a greater diameter than the recesses in the bosses 22 so that the shafts 24 are axially restrained'therein. Inserted under the head or" one ofi the screws 25 is an arm 3| (Fig. 6) having a tab 32 projecting'normally therefrom to engage the actuating pin 33 for the switch S which is attached to the rear of the body 2|! by means of four screws 34.

Secured' to the front end of the shafts 24 are two similarly shaped rotatable members such as the arms 36 which are distinguished from one another by the subscripts ct' and b respectively. Each of the arms 36Fhas anaperture in theupper end thereof through which projects the correlated screw 26' so that the associated lock washer 21 forces the arm against the abutting end of the shaft 2li, thus preventing relative rotation therebetween. The opposite end of each of the armsi is provided with a projecting linger 31, the upper side of whichis shaped to provide a cammed portion 38 whose use will be described hereinafter. The bottom of each cam forms a detent portion. The arms 3SY are biased towards each other by means ofV a spring 40, the ends of which are secured in apertures'` in the respective arms.

The details of construction of an actuator l for rotating the arms 36 against the biasing action of the spring `lill are best shown in Fig. 7.

The actuator 4| comprises a plunger 42 which is reciprocatingly disposed within an aperture 43 in the bridge 22 (see also Fig. ll). rIhe diameter of the plunger Q3 is reduced as at il to accommodate a spring 46 having one end abutting the shoulder1 resulting from the reduction in plunger diameter and the other end abutting the shoulder 48 formed by a reduction in diameter of the aperture 43 so that the spring exerts an upward biasing force upon the actuator 4|. The

diameter of the plunger 42 is further reduced as at 49,50 that it may project through an aperture 4| in the bottom portion of the bridge 22. A stop is provided for the actuator il by a washer 52 which is slipped over the projecting end 59 of the plunger 4| and held in place by peening asat 53'.

The cammed portions of the arms St are contacted by a face such as the end of finger 5|!- projecting from an arm 55 pivotally secured to the, plunger 42, by means oi a screw 56. Inserted between the` arm. `55 and the plunger `112 is a spacer 51, the plunger being slotted as at 58 to provide a iiat bearing surface. for the end of the spacer. The opposite end of the arm 55 is engaged by the centrally disposed coils of a spring 59'A which extends between the flanges 23 so that the pivotalportion is biased. inY a central position.

The above described embodiment operates as follows. The-switch; S is in its normal condition when the arm 3| is inthe raised position shown in Fig. 6 corresponding; to the position of arms 35m. and 35h' shownin Fig` 1 wherein the arm lith is urged by thev spring 4E! to what may be termed. the biased limit of its path of travel. The arm 36a is simultaneously held at the opposite limit of its travel by the detent portion 39 of the arm 3th. hence the arms remain in at state of' stable equilibrium. The actuator 4| is biased upwardly by theVV spring it so that the ringer 54 isv notin contact with either of the arms-36a or 36h.

As the actuator 4| is forced downwardly, the finger `Ell' contacts the cammed portion of the arm 36h rotating such arm in its path of travel until its opposite limit of travel is reached as is shown in Fig. 2,' which limit is determined by the movement of the actuator. ySuch movement of the arm 3&1] releases the arm 36a so that it is urged by the spring it to the biased limit of its travel. Thisv movement of arm 35a rotates Y the shaft 2li thusA moving the arm 3|v (Fig. 6) to depress the switching actuating pin 33. Upon the return of the actuator 4| to its upper biased position, the detent portion 39y of the arm 36a maintains the arm. 35h at the opposite limit of travel so that the Iarms remain in the state of stable equilibrium shown in Fig. 3. In this state the pin 33 is depressed to maintain the switch-S with its contact in the transferred position until the arms are returned to the previously described state shown in Fig. l by a subsequent stroke of the actuator 4|.

In Figs. 8 and 9 is shown a second embodiment of the invention wherein the switch S is replaced by the movable contacts te. Each contact 63 (Fig. 10) comprises a contact point 6|, for example of a silver alloy, welded, riveted or otherwise secured to one'lange of a channel member 52. The other-flange of the channel member 62 is fastened to an arm 63 of insulating material which replaces the arm 3|. An aperture 64 is provided in one endof the arm 53 s0 that the end thereof accommodates the screw 26 securing the arm to the abutting end of the shaft 24.

The frame 2U is also altered in this embodiment having cast integral therewith two projecting tabs 6B whereupon a panel 68 of plastic or other insulating material is `fastened by the screws 61. Two sets of stationary contacts 69 for cooperating with the respective movable contacts Eil are mounted upon the insulating panel 68.

The operation of the actuator 4l in this embodiment alternatively to move the arms 36d and 36h between the states of stable equilibrium at the limits of their paths of travel is the same as that described heretofore in connection with the iirst embodiment. The movement of the arms 36 rotates the shafts 24 so that the attached movable contacts 60 make and break with the stationary contacts 69. In the embodiment illustrated the contacts are arranged so that one set is open and the other set closed in one state of equilibrium, this contact relationship reversing upon the movement of the arms 36 `to the other state of equilibrium. It will be obvious, however, that by means of other `contact configurations both sets of contacts can be arranged to he closedor opened in either state of equilibrium ofthe arms 36.

A third embodiment is shown in Fig. 11 wherein the panel B8 is eliminated and the movable contacts 60 are replaced by the arms 1I which rotate back and forth in response to the movement oi the actuator 4I as was described in detail hereto- I fore. .Pivotally attached to the end of the arm 1l is a rod 12 `for actuating an associated mechanical device (not shown) for example a valve or detent of conventional construction which is alternatively opened and closed by successive strokes of the actuator 4| In Figs. 12 and 13 a fourth embodiment comprises two arms 36a. and 36h pivotally attached by the screws 26 to a web 22' of a channel shaped frame formed from sheet metal by bending the flanges 23' at right angles to the plane of the web 22. Each of the pivoted ends of the respective arms 36a. and 361i'- is provided with an aperture for a respective screw 28 which also projects through an aperture in a spacer to engage a threaded hole in the web22. The opposite end of the arm 36h has cammed and detent portions 38 and 39' which cooperate `with similar portions in the end of the arm 36a.' in the same manner as the corresponding portions 38 and 39 cooperate as was described in detail heretofore.

Biasing for the arms 36a' and 35h is again supplied by a spring 40 which interconnects the arms. A pivotal arm 55 for contacting the cammed arm portions 33 is fastened to an` actuator di by a pin 56. .The actuator lll is reciprocatingly attached to the web 22 by means of the rivets 13 which project through an elongated slot in the actuator to engage the web. The actuator 4i is biased upwardly by the restoring force of a leaf spring 14.

The arms 36a. and 36h each` carry a respective movable contact 15 thereupon which mate with the correlated stationary contacts 16 mounted upon the web 22 by means of the insulating plates 11. The arms 36a and 36h are alternatively shifted from a state of equilibrium at one limit of their respective paths of travel to another state of equilibrium at the opposite limit thereof in a manner analogous to that described in detail heretofore with reference to the other embodiments of the .inventionby` the downward movement of the actuator 4l. Such movement may Vbe accomplished either by manually pushing -upon tor 4 l is depressed, the first stroke thereof opens one set of contacts 15-16 and conjointly closes the other set of contacts in which position the contacts remain until the actuator is `again depressed. The second actuator stroke opens the closed contacts and closes the open contacts thereby restoring the original configuration. Subsequent strokes of the actuator di' repeat the above Contact operating cycle.

In Figs. 14 through 17 is shown another embodi ment of the invention wherein the movable members 8l have a reciprocating linear travel rather than the rotary movement common to the above described embodiments. The members 8l are in the form of rods which are slidably restrained in aligned circular apertures in ways 62 fastened to a base plate 83. The members 3l are biased towards each other by means of springs 84 posi tioned circumjacent the respective members so that one end of each spring bears against a respective `way S2. The other end of each spring 84 bears against a collar 8B fastened to the correlated rod member BI so that the rod member is biased upwardly.

The rod members 8 la and 81h are provided with cammed portions such as the conical recesses 81 in the upper ends thereof for cooperating with a pivotal portion of an actuator e3. The pivotal portion comprises a pin 89 one end of which is tapered to engage the conical recesses d1. The other end of the pin 89 is secured toa block 9i which is pivotally fastened in a slot in the end of a sliding member 92 by means of a pin S3 (Fig. 14). The pivotal portionis biased to a central position by means of a spring 9d recessed in an aperture in the sliding member 92 behind a pin 96 bearing against the block 9i.

The sliding member 92 is guided in ways 91 and a cover plate 96 fastened thereto by means of screws 99. The actuator 88 is biased in an upward position by means of a leaf spring IUI which bears against the end portion of the sliding member 92 below the block 9|. The opposite end of the member 92 is provided with a handle HBO whereby it maybe manually depressed to operate the mechanism. i

In Fig. 14 the mechanism is shown at the beginning of the iirst stroke of the actuator 8i. with a switch S operated thereby in its normal position. The rod member Bib is urged upwardly by the spring 64b towards the spring biased limit of its travel.V The rod member 8 I a, is at the .opposite limit of its travel being held in such position against the force exerted by the spring 84a, by the contact of the end of the rod member with the side of the rod member'lb which acts as a detent. The conical recess 61 in the end of the rod 8Ib is in the path of the actuator 88 so that as the actuator descends during the first stroke, the tapered end of the pin 89 contacts the recess thereby moving the rod member to the opposite limit of its travel as shown in Fig. 15; In such position a chamfered edge of the collar 86 intercepts an actuating pin |02 thereby transferring the contacts of the switch S.

As the rod member SIb is moved downwardly its side portion which acts as a detent no longer restrains the rod member 81d so that the member 81a is moved upwardly to the spring biased limit shown in Fig. 15 wherein it restrains the member 8|b as the actuator di is moved upwardly as is shown in Fig. 16. In this position the contacts of the switch S remain transferred until the rod members Bld and 81h are again returned to the positions shown in Fig. 14 by a subsequent stroke of the actuator 88.

It should be understoodthat the present disclosure is for the purpose of illustration only and that this invention includes-all modifications and equivalents which fall within the scope of the appended claims.

I claim:

1. A mechanism for operating an asscciated device comprising two movable members positioned relatively to each other with their respective paths of travel intersecting, one of said members operating said device during its travel, biasing means for urging the members towards one limit of travel of their respective paths, and an actuator mounted for movement in a path intersecting said paths and having a ace for contactingV and for alternatively moving said members from the biased limit to an opposite limit of'their respective paths upon alternately contacting saidmembers with said face during successive strokes of the actuator in its path, said members being arranged so that the first member is moved to said opposite limit by contact with said face during one stroke of the actuator and maintained at such limit byA the second member, the succeeding stroke of the actuator in the same direction as the preceding stroke moving said second member to the opposite limit of its path thereby` releasing said iirst member so thatk it returns to the biased limit of its path wherein it maintains the second member at such opposite limit of its path of travel. l

2. A mechanism for operating an associated device comprising two similarly shaped movable members positioned relatively to each other with their respective paths of travel intersecting, one of said members operating said device during its travel, spring biasing meansfor yieldablg7 urging the members towards one limit of travel of their respective paths, and an actuator mounted for movement in a path intersecting said paths and having a face for contacting and for alternatively moving said members from the spring biased limit to an opposite limit of their respective paths upon alternately contacting said members with said face during successive strokes of the actuator in its path, said members being arranged so that the nrst member is moved to said opposite limit by contact with said face during one stroke of the actuator and maintained at such limit'by the second member, the succeeding stroke of the actuator inthe same direction asthe preceding stroke moving said second member to the opposite limit of its path thereby releasing said iirst member so that it returns to the spring biased limit of its path wherein it y maintains the second member at such opposite limit of its path oi travel.

3. A mechanism for operating an associated device comprising two movable members having similar paths of travel and positioned relatively to each other with their respective paths intersecting, one of said membersr operating said device during its travel, biasing means for urging the members towardsone limit of travel of their respective paths, and an actuator mounted for movement in a path intersecting said paths and having a face for contacting and for alternatively moving said members' from the biased limit to an opposite limit of their respective paths upon alternately contacting said members with said face during successive strokes of the actuator 'in its path, the paths ofv travel of said respective members being arranged symmetrically with resnect to they actuator path so that the nrst member is moved to said opposite limit byr contact with said face during one stroke of the actuator and maintained at such limit by the second member, the succeeding stroke of the actuator in the same direction as the preceding stroke moving the second member to the opposite limit of its path thereby releasing said first member so that it returns tothe biased limit of its path wherein it maintains the second member at such opposite limit of its path of travel.

4. A mechanism for operating an associated device comprising two movable members slidably arranged relatively to each other with their respective paths of travel intersecting, one of said members operating said device during'its travel, biasingl means for urging the members towards one limit of travel of their respective paths, and a reciprocating actuator mounted for movement in a path intersecting said paths and having a pivotally arranged portion with a face for contacting and alternatively moving said members from the biased limit to an opposite limit of travel of their respective paths upon alternately contacting said members fwith said face during successive strokes of the actuator, said members being arranged so that the first member is moved to said opposite limit by contact with said face during one stroke of the actuator and maintained at such limit by the second member, the succeeding stroke of the actuator in the same direction as the preceding stroke moving the second member to the opposite limit oi its -path thereby releasing said iirst member so that it returns to the biased limit of its path wherein it maintains the second member at such opposite limit of its path of travel.

5. A mechanism for operating an associated device comprising two movable members slidably arranged relatively to each other with their respective paths of travel intersecting, each of said members having a cammed portion and a detent portion, one of said members operating said device during its travel, biasing means for urging the members towards one limit of travel of their respective paths, and a reciprocating actuator mounted for movement in a path intersecting said paths and having a pivotally arranged portion with a face for alternatively contacting the cammed portions of the respective members thereby alternatively to move saidrmembers from the biased limit to an opposite limit of travel of their respective paths upon alternately contactingsaid members with said face during successive strokes of the actuator, saidV members being arranged sov that the nrst member is moved by the pivotal portion of the actuator to said opposite limit by contact with said face during onestroke. of the actuator and maintained at such limit by the detent portion of the second member, the succeeding stroke of the actuator in the same direction as the preceding stroke moving the second member to the opposite limit of its. path therebyV releasing said first member so that it'returns to the biased limit of its path wherein its detent portion .maintains the second member at such opposite limit of its path of travel.

6. A mechanism for operating an electric switch comprising two similarly shaped movable members slidably arranged relatively to each other with their respective paths oil travel intersecting, each of said members having a cammed portion and a detent portion, one of said members operating said switch during its travel,r spring biasing means for yieldably urging the members towards one limit of travel of their respective paths, and a reciprocating actuator mounted d natively to move said members from the biased limit to an opposite limit of travel of their respective paths upon successive strokes of the actuator, the paths of travel of said respective members being arranged symmetrically with respect to said path of travel of said actuator so that the nrst member moved by the pivotal portion of the said actuator to the opposite limit by one stroke of the actuator is maintained at such limit by the second member, the succeeding stroke of the actuator moving the second member to the opposite limit of its path thereby releasing said iirst member so that it returns to the biased limit of its path wherein it maintains the second member at such opposite limit of its path of travel.

7. A mechanism for operating an associated device comprising two rotatable members pivotally arranged relatively to each other with their respective paths of travel intersecting, one of said members operating said device during its travel, biasing means for urging the members towards one limit of travel of their respective paths, and a reciprocating actuator mounted for movement in a path intersecting said paths and having a face for contacting and having a pivotally arranged portion for alternatively rotating said members from the biased limit to an opposite limit of travel of their respective paths upon alternately contacting said members wit said face during successive strokes of the actuator, said members being arranged so that the first member is rotated to said opposite limit by contact with said face during one stroke of the actuator and maintained at such limit by the second member, the succeeding stroke of the actuator in the same direction as the preceding stroke rotating the second member to the opposite limit of its path thereby releasing said iirst member so that it returns to the biased limit of its path wherein it maintains the second member at such opposite limit of its path of travel.

8. A mechanism for operating an associated device comprising two rotatable members having arcuate paths of travel and positioned relatively to each other with their respective paths intersecting, one of said members operating said device during its travel, `biasing means for urging the members towards one limit of travel of their respective paths, and a reciprocating actuator having a pivotally arranged portion mounted for movement in a path intersecting said paths and having a face for contacting and alternatively rotating said members from the biased limit to an opposite limit of travel of their respective paths upon alternately contacting said members with said face during successive strokes of the actuator, the paths of travel of said respective members being arranged symmetrically with respect to the Ipath of the actuator so that the first member is rotated to said opposite limit by contact with said face during one stroke of the actuator and maintained at such limit by the second member, the succeeding stroke of the actuator in the same direction asthe preceding stroke rotating the second member to the opposite limit of its path thereby releasing said rst member so that it returns to the biased limit of its path wherein it maintains the second member at the opposite limit of its travel. Y 9. A mechanism for operating an associated 10 device comprising two rotatable memberspivotally arranged relatively to each other with their respective paths of travel intersecting, each of said members having a cammed portion and a detent portion, one of said members operating said device during its travel, biasing means for urging the members towards one limit of travel of their respective paths, and a reciprocating actuator mounted for movement in a path intersecting said paths and having a pivotally arranged portion with a face for alternatively contacting the cammed portions of the respective members thereby alternatively to move said members from the biased limit to an opposite limit of `travel of their respective paths upon alternately contacting said members with said face during successive strokes of the actuator, said members being arranged so that the iirst member is moved by the pivotal portion of the actuator to said opposite limit by contact with said face during one stroke of the actuator and maintained at such limit by the detent portion of the second member, the succeeding stroke of the actuator in the same direction as the preceding stroke moving the second member to the opposite limit of its path thereby releasing said first member so that it returns to the biased limit of its path wherein its detent portion maintains the second member at such opposite limit of its path of travel.

l0. A mechanism for operating an associated device comprising two rotatable members having arcuate paths of travel and positioned relatively to each other with their respective paths intersecting, one of said members operating said device during its travel, spring biasing means for yieldably urging the members towards one limit oi' travel of their respective paths, and a reciprocating actuator mounted for movement in a path intersecting said paths and having a pivotally arranged portion for alternatively rotating said members from the spring biased limit to an opposite limit of travel oi their respective paths upon alternately contacting said members during successive strokes of the actuator, the paths of travel oi said respective members being arranged symmetrically with respect to the path of the actuator so that the iirst member is rotated to said opposite limit by one stroke of the actuator and maintained at such limit by the second member, the succeeding stroke of the actuator in the same direction as the preceding stroke rotating the second member to the opposite limit of its Path thereby releasing said iirst member so that it returns to the biased spring limit of its path wherein it maintains the second member at such opposite limit of its path of travel.

1l. A mechanism for operating associated devices comprising two rotatable members pivotally arranged relatively to each other with their respective paths of travel intersecting, each of said members alternatively operating during its travel, one of the respective devices, biasing means for urging the members towards one limit of travel of their respective paths, and a reciprocating actuator mounted for movement in a path' intersecting said paths and having a pivotally arranged portion with a face :for contacting and alternatively rotating said members from` the biased limit to an opposite limit of travel of their respective paths upon alternately contacting said members with said face during successive strokes of the actuator, said members being arranged so that the first member is rotated to said opposite limit by the pivotal portion upon one stroke of the actuator and maintained at such limit by the second member, the succeeding stroke of the actuator in the same direction as the preceding stroke rotating the second member to the opposite limit of its path thereby releasing said first member so that it returns to the biased limit of its .path wherein it maintains the second member at such opposite limit of its path of travel.

12. A mechanism for operating a switch comprising Ytwo rotatable members having arcuate paths of travel and positioned relatively to each other withr their respective paths intersecting, one of said members changing the position of said switchduring its travel, biasing means for urging the members towards one limit of travel of their respective paths, and a reciprocating actuator mounted for movement in a path intersecting said paths and having a pivotally arranged portion with a face for contacting and alternatively rotating said members from the biased limit to an opposite limit of travel of their respective paths upon alternately contacting said members with said face during successive strokes of the actuator, the paths of travel oi said respective members being arranged'synimetrically'with respect to the path of the actuator so that vthe nrst member is rotated to said opposite limit by one stroke of the actuator and maintained at such limit by the second member thus holding the switch in the transferred'position, the succeeding stroke of the actuator in the same direction as the preceding stroke rotating the second member to the opposite limit of its 'path thereby releasing said first member so that it returns to the biased limit of its path wherein it maintains the second member at such opposite limit of its path of travel.

13. A mechanism for operating an associated device comprising a body including two spaced bosses and a connecting portion joining the bosses, said connecting portion having an aperture with an axis normally disposed to a plane through the axes of said bosses, two rotatable members pivotally'secured to the respective bosses so that their respective paths of travel intersect one of said members operating said device during its travel, biasing means for urging the members towards one limit of travel of their respective paths, and an actuator `reciprocatingly disposed in `said body aperture in a path intersecting said paths and having a pivotally arranged portion with a face for contacting and alternatively rotating said members from the biased limit to an opposite limit of travel of their respective paths upon yalternately contacting said members with said face during successive strokes of the actuator, said members being arranged so that the rst member is rotated to said opposite limit by one stroke of the actuator and maintained at such limit by the second member, the succeeding stroke of the actuator inthe same direction as the preceding stroke rotating the second member to the opposite limit of its path thereby releasing said nrst member so that it returns to the biased limit of its path wherein it maintains the second member at such opposite limit of its path of travel.

14. A mechanism for operating a switch cornprising a body vhaving the switch mounted upon one side thereof, said body including two spaced bosses having respective axial apertures therethrough and a connecting portion joining the bosses, said connecting portion having an aperture with an axis normally disposed to a plane through the axes of said bosses, two shafts journaled in the respective boss apertures, two

similarly shaped rotatable members secured to the respective ends of said shafts projecting from the bosses'upon the opposite side `ofsaid "body from said switch so `that the respective vpaths of travel of the members intersect, an arm see curedto the opposite end of one of said kshafts for operating said switch,a biasing spring connecting the members for urging the `merribers towards one' limit of travel -of their respective paths, an actuator reciprocatingly disposed -in said body aperture in a pathintersecting -said paths andv having Va pivotally arranged portion,

and a biasing spring for yieldably maintaining said pivotal portion lparallel to the path of the actuator, said members having cammedand dei tent portions respectively whose ,arcuate paths of travel are symmetrically arranged with respect to the path of the actuator whereby Vthe pivotal portion of the actuatoralternatively contacts said cammed portions thereby tofrotate said members from the spring biased limit A.to an opposite limit of travel of their respective paths upon successive strokes ofthe actuator so that the rst member is rotated tosaid opposite limit by one stroke of theactuator to actuate the switch and maintained at such limit by the second member, the succeeding stroke of the actuator in thelsame direction as Vthe preceding stroke lrotating the secondmember to the opposite limit Aof its path thereby releasing said first member so that it returns to the .biased limitof its path to release the switch wherein the first member'maintains the second member at such opposite limit of its path of travel;

i5. A mechanism for-operating electrical contacts comprising a body having an insulation portion whereupon ismou'nted one of said contacts, said bodyV Vincluding two -spacedpbosses having respective axial apertures therethrough and a connecting portion joining the bosses', said connecting.portionhaving an apertiire with an axis normally disposed to a plane thrugh the axes of said bosses, two shaftsjornaled in the respective Yboss apertures, two similarly shaped rotatable members YSe'cured'rto 'the respective ends of said shafts .proiec'ting trom the bosses upon 'the opposite side of said bodyfroin said contacts so lthat the respective paths of travel of the members intersect, an armrcarrying a second contact 'secured to theo'pposite end of one of said shafts, abiasing'spring connecting the members for urging themembers towardsone limit of travel of their respective paths, an `actuator reciprocatingly disposed in said body 'aperture in va path intersecting saidpa'ths `and having a pivotall'y arranged portion, and a A.biasing spring for 'yieldably maintaining said pivotal 'por tion parallel to 'the path of the actuator, said rotatable members having cammed and detent portions respectively vwhose, `arcuate :paths 'of travel are symmetrically arranged with respect to the path of the actuator Awhereby;the `pivotal portion of 'the actuatoralternatively; 'contacts saidcamme'd portions ltherebycto'[rotate said members from the springjbiased limit to opposite. limit of travel of their respective paths upon successive strokes of the actua or so tl'iat the first member i's rotated to' said'o'pposite limit by one stroke of the actuator tofcl'os'e the "co'n1- tactsa'nd `ma'intair'i'ed at such limit bythe second member, the succeeding stroke of, the actuator in the 'same direction as the preceding Y'stroke rotating the second member Ito. "the `o'ppi'isite limit of its path thereby .releasing vsaid first member so that 'it returns to .the .biased .li-'iz'ii'tA of its path to open the contacts wherein-thefflirs't 13 member maintains the second member at such opposite limit of its path of travel.

16. A mechanism for operating electrical contacts comprising a channel shaped body having a web portion with two anges upon the opposing sides thereof respectively, said web portion also having attached thereto one of the contacts, two similarly shaped rotatable members pivotally secured to the web portion, one of said members carrying a second contact, a biasing spring connecting thermembers for urging the members towards one limit of travel of their respective paths, an actuator reciprocatingly attached to said web portion for movement in a path intersecting said paths and having a pivotally arranged portion, and a biasing spring for yieldably maintaining said pivotal portion parallel to the path of the actuator, said rotatable members having cammed and detent portions re` spectively whose arcuate paths of travel are symmetrically arranged with respect to the path of the actuator whereby the pivotal portion of the actuator alternatively contacts :said cammed portions thereby to rotate said members from the spring biased limit to an opposite limit of travel of their respective paths upon successive strokes of the actuators@ that the REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 828,788 Vogel Aug. 14, 1906 861,800 Brown July 30, 1907 1,131,447 Wallace Mar. 9, 1915 1,380,486 Langley June '7, 1921 FOREIGN PATENTS Number Country Date 341,221 Great Britain Jan. 15, 1931 

